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datarecovery:ext4 [2016/08/20 14:32] – created niziakdatarecovery:ext4 [2020/04/23 08:26] (current) – niziak
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 +====== EXT4 ======
 +
 +==== Determine FS block size ====
 <code bash> <code bash>
 # tune2fs -l /dev/mapper/sdb5 | grep Block # tune2fs -l /dev/mapper/sdb5 | grep Block
Line 6: Line 9:
 </code> </code>
  
-=== ext4 on LUKS ===+Try to read bad sector: 
 +<code bash>hdparm --read-sector 965009739 /dev/sda</code> 
 + 
 +Write sector with zeros: 
 +<code bash>hdparm --yes-i-know-what-i-am-doing --repair-sector 965009739 /dev/sda</code> 
 + 
 + 
 +==== ext4 on LUKS ==== 
 <code bash>cryptsetup luksDump /dev/sdb5</code> <code bash>cryptsetup luksDump /dev/sdb5</code>
 +
 +<code>
 +Version:        1
 +Cipher name:    aes
 +Cipher mode:    cbc-plain64
 +Hash spec:      sha512
 +</code>
 +
 +<code>
 +# cryptsetup status /dev/mapper/sdb5
 +/dev/mapper/sdb5 is active.
 +  type:    LUKS1
 +  cipher:  aes-cbc-plain64
 +  keysize: 128 bits
 +  device:  /dev/sdb5
 +  offset:  2048 sectors
 +  size:    1942970368 sectors
 +  mode:    read/write
 +</code>